By the way, don't you think this forum should have "upvote" functionality like reddit? It's not fair you helped me but you don't have any reward

Ok I also kind of agree if burner inserters don't have any "buffer" inside of then. It's very weird

I know what's wrong guys, thank you, I'm surprised it took so short! I kinda don't agree it's not a bug. I think burner inserters should've taken coal from burner mining wheel even though they are not in front of drop point of them.. That's what long inserters do, don't they?

I'm playing "tight space" scenario. Unfortunately burning mining drill is not mining even though it has enough coal and target has enough space.... Here's save